Passenger side front caliper sticking? - Pontiac G6 Forum
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post #1 of 8 (permalink) Old 11-11-2018, 08:26 PM Thread Starter
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Passenger side front caliper sticking?

Bought my g6 used about 5 months ago, about a month ago my brakes started grinding so I assumed it was just time for a brake job. Replaced all four rotors and brake pads, and the grinding went away for a few days until I started to feel a vibration coming from the passenger wheel. Checked it out, my caliper for that sole wheel was burning hot and the brake pads were smoking. I believe the caliper is sticking which is causing it to warp the rotor. Anyone with a similar issue or solution?
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post #2 of 8 (permalink) Old 11-12-2018, 11:56 AM
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Personally I would be checking that the slide pins were moving freely, the pads are free to move in the shims and the piston on the caliper can be compressed. Brake Caliper Sticking Causes and Fixes. Hope you get it sorted.
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post #3 of 8 (permalink) Old 11-12-2018, 08:19 PM
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I had the right rear caliper smoke up and all that after brake work. The pins were binding in the caliper housing. I thought that just getting it to move a bit was fine. No, it needs full movement. The piston was fine.
I could have bought a caliper, but I am cheap. I did a lot of soaking and hammering to get the pins out. I totally worked my ass off to clean up the corrosion, then reassembled. It's been good for the past few years.

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post #4 of 8 (permalink) Old 11-14-2018, 11:49 PM
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So here is expert advice, if the slide pins stick, it causes the outboard pad to wear faster, if the piston sticks, it causes the inboard pad to wear faster. The piston can be sticking because of build up inside, a swollen seal and also if a brake line , the rubber one near the caliper has swollen. That will cause the piston to push out and not retract. If it ends up being a hose, the most likely cause is fluid contamination. Any fluid other than DOT 3 or DOT 4 causes this. The worst is one someone accidently put even a small amount of motor oil, power steering fluid or transmission fluid. I have seen this destroy every brake part that has a rubber part in it. Meaning the master cylinder, the equalizer (proportioning valve), the ABS unit, all four of the brake lines that go to each wheel and the calipers and wheel cylinders if the vehicle has them. So if you find this to be the case, good luck. Hopefully it is a caliper only. You can buy what they call a "loaded caliper" which is complete with hardware, a new anchor and pads. If you go with option, you will need to get a matching set of pads only for the other side or it will cause more brake problems. Your brakes need to grab evenly in the front. It should have the two copper crush washers that go on each side of the banjo bolt that holds the brake line to the caliper.


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post #5 of 8 (permalink) Old 11-20-2018, 06:36 AM
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Yes I have and I’ve gone to belle tire they give a lifetime unlimited warranty on them, as in, you keep getting free pads and rotors as long as you own the vehicle and half the issue is that the G6 to be quite honest is a tank because when you get in it if you weigh at least 100 pounds which I hope to God you do the car will weigh almost if not over 4000 pounds and that grinds the little brakes down very fast even though you can’t feel it because the stock brakes have great stopping power.
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post #6 of 8 (permalink) Old 11-23-2018, 09:06 PM
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Similar thing happen to me after I replaced the pads. I was told by my local mechanic that the rubber hose to the calipers break down on the inside and do not let the fluid flow freely back to release the caliper. I changed both sides and the problem went away. He said its very common on the GM products.
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post #7 of 8 (permalink) Old 11-24-2018, 02:45 PM
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Thats why I put slotted and drilled rotors on ours with ceramic pads. They help dissipate heat, which is hard on brakes. You can get a full set of pads and rotors like mine for $160 delivered right to your front door. Free shipping. Just make sure to lube the slide pins real good. It is usually a good idea to at least bleed out the lines and master cyl with new fluid. This can be done easily with a turkey baster.

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post #8 of 8 (permalink) Old 11-28-2018, 08:42 PM
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Flex Hose holds pressure

Our 2006 G6 GTP had a stuck caliper, passenger front, that was caused by the flex hose between the caliper and solid line connection. The problem is related to the clamp that is used to hold the hose in place on the strut. The new hose will come with a new clamp installed on it. The bad hose on our car would not allow air to pass through it. The restriction was in the area that passes through the clamp.
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